Nearly 30 years after the killing of a 19-year-old woman at a party near Prescott, authorities have arrested her former roommate on suspicion of murder.

Shelly Marie Harmon, 46, also known as Shelly Norgard, was arrested in Nevada last month. She was brought to Arizona, where she is being held in Yavapai County Jail in connection with the murder of Pamela Pitts in 1988, the Yavapai County Sheriff's Office said.

Harmon previously was convicted and served time for another killing, which occurred after Pitts' death, the Sheriff's Office said.

Officials said Pitts was last seen at a party at a place known as "Gordo's Pit,'' or "Alto Pit," located in a forest area near Prescott, on Sept. 16, 1988. Her burned body was found at the same location about two weeks later, on Sept. 29.

Pamela Pitts, 19, was found dead in a forest area near Prescott in 1988. Police arrested a suspect connected to the murder in early June.(Photo: Yavapai County Sheriff's Office)

Harmon and Pitts had been roommates for a few months at the time of Pitts' death, sheriff's officials said.

Three years after Pitts' death, Harmon was arrested on suspicion of murdering her boyfriend In Prescott. She was convicted in 1993 and sentenced to 20 years in prison, sheriff's officials said.

A Sheriff's Office news release on Thursday said detectives had suspected Harmon's involvement in Pitts' death through the years, but in the past several months developed new evidence linking Harmon to Pitts' death. Officials did not specify that evidence, saying it would not be disclosed until court proceedings are held.

Harmon waived extradition proceedings from Nevada and is being held at the Camp Verde Detention Center on suspicion of first-degree murder. Her bond is set at $3 million.